Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5149c6a6e91c408…

MALICIOUS

PDF

76.9 KB Created: 2021-09-16 08:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 66aaaef956c507c3358a9fe5d74a6b64 SHA-1: de91ebb59a5814eaa5a83a178e8390fe49d1afcd SHA-256: d5149c6a6e91c40876674e475acc1a44bcbd03d166340b985e1d30aa74822f42
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://queure.ru/uplcv?utm_term=123movies+zombieland+double+tap PDF link annotation
    • http://style4.allwebeasy.com/userfiles/files/funonutilezejudadigepuvo.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/luwivekazeleda.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210907_20CE84B12655E98D.pdfIn PDF document text
    • https://bawauang.com/contents/files/ruxufawuwakuvazomapeduj.pdfIn PDF document text
    • http://ladna.pl/user_images/file/59837968627.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/28186585105.pdfIn PDF document text
    • http://park-seversk.ru/other/js/ckfinder/userfiles/files/1474570906.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/31107506461.pdfIn PDF document text
    • http://tianlanlawyer.com/filespath/files/20210909060608.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/90026990831.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/tegorosa.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/duwom.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/fuzafoxujumajapuwa.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/lasebigag.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/gijagebamudovebunuwog.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/57750447498.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/jifiwamuzowatekeze.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/rexigakozaduled.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/44278349939.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/nezoxeraxekavabubijosad.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/97284119788.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/92949866032.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC799 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB0 11068 bytes
SHA-256: aa39099d6d703f2186bcc8a421cc3fcea5382b295a87a2aa0e5f37fc227b476b
font_02_sfnt_off0000f957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF957 17552 bytes
SHA-256: 1ef9b4d5fbec4c33e43d85d256e0162fa69b98cdc12ff869371fddd622f4d2c7

Open this report in the interactive analyzer, or submit your own file for analysis.